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dc.creatorBianchi, Stefano
dc.creatorPlastino, Wolfango
dc.creatorBrattich, Erika
dc.creatorĐurđević, Vladimir
dc.creatorLongo, Alessandro
dc.creatorHernandez-Ceballos, Miguel A.
dc.creatorSarvan, Darko
dc.creatorAjtić, Jelena
dc.date.accessioned2020-06-03T14:33:55Z
dc.date.available2020-06-03T14:33:55Z
dc.date.issued2019
dc.identifier.issn0969-8043
dc.identifier.urihttp://vet-erinar.vet.bg.ac.rs/handle/123456789/1745
dc.description.abstractThe activity concentrations of beryllium-7, a natural radiotracer that is considered as a tracer of the strato-spheric-tropospheric exchange, shows a distinct behaviour in Northern Europe compared to the central and southern parts of the continent. In this study, we use the measurements collected at four sampling stations in Scandinavia (Ivalo, Umea, Kista, Risoe) between 2001 and 2010 and investigate their trends, periodicities and residuals with the aim to further understand the common features in the beryllium-7 data records in northern sampling sites. The beryllium-7 activity concentrations exhibit statistically significant positive trends that range from an average value of 1.50%/year to an average value of 2.96%/year. We detect a one-year periodicity in all the sites, and in the southernmost site, Risoe in Denmark, additional higher-frequency harmonics. In the residual time series, we find outliers that represent occurrences of extremely high beryllium-7 activity concentration. Cross-correlations of the beryllium-7 residuals across the four sites decrease with increasing distance; similarly, as indicated by local Hurst exponents the records exhibit long-range correlations that weaken towards the end of the investigated period. To investigate the causes of the detected trends, we also calculate correlations between beryllium-7 and factors related to its production, transport and removal from the atmosphere: in particular, cross-correlations of the beryllium-7 residuals with residuals in sunspot number, local temperature, atmospheric pressure and precipitation, as well as Arctic Oscillation index and North Atlantic Oscillation index. Most of the obtained correlations, however, are not statistically significant, highlighting the need to analyse a longer time period in order to evaluate the impact of different factors on the airborne beryllium-7 activity concentration.en
dc.publisherPergamon-Elsevier Science Ltd, Oxford
dc.relationinfo:eu-repo/grantAgreement/MESTD/Integrated and Interdisciplinary Research (IIR or III)/43007/RS//
dc.rightsrestrictedAccess
dc.sourceApplied Radiation and Isotopes
dc.subjectBeryllium-7en
dc.subjectDecompositionen
dc.subjectOutliersen
dc.subjectHurst exponenten
dc.subjectCross-correlationen
dc.titleAnalysis of trends, periodicities, and correlations in the beryllium-7 time series in Northern Europeen
dc.typearticle
dc.rights.licenseARR
dcterms.abstractБраттицх, Ерика; Хернандез-Цебаллос, Мигуел A.; Лонго, Aлессандро; Бианцхи, Стефано; Aјтић, Јелена; Сарван, Дарко; Пластино, Wолфанго; Ђурђевић, Владимир;
dc.citation.volume148
dc.citation.spage160
dc.citation.epage167
dc.citation.other148: 160-167
dc.citation.rankM22
dc.identifier.wos000469892600024
dc.identifier.doi10.1016/j.apradiso.2019.03.038
dc.identifier.pmid30959353
dc.identifier.scopus2-s2.0-85063879483
dc.identifier.rcubconv_2490
dc.type.versionpublishedVersion


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